Re: that damn 16v conversion

["John Van Vuren" <veedublu@prod.net>]

The ignition coil should receive power to it's positive terminal constantly.
The negative terminal is what is controlled by the hall sender/computer
stuff (or good ol' points in the old days).  So, if you apply power to the
positive terminal, then run a wire from ground to the negative terminal
(leave this end loose, don't bolt it right to the coil).  Every time you
touch the terminal with the grounded wire, you should produce one spark.

On a VW I would be sure to disconnect all other wires as I'm not sure how
this would affect the computer or hall sender.

There is also other stuff involved, but that should tell you if the coil is
good or not.  Some coils have internal resistance and some have external -
this may only apply to point systems, not sure.

Hope this helps

John

'82 16v pickup
and lots of other stuff
website - http://www.prod.net/jvanvuren/vw.htm


>>Are you sure it's bad?
>
>No.
>
>The electrical test passes, but the plastic carrier that holds it in the
>distributor body is cracked, and with the cap off, it flops around. I
figure
>I'd have to replace it one day, anyhow. And, it could only be partially
>functioning. I dunno...
>
>This problem bugs the shit out of me, cause it makes no sense.
>
>As I turn the igniton on, I can see a spark from the primary wire (taken
off
>the distro) to engine block ground, but once I try to crank it, no sparks
>fly. Definatley nothing at the plug ends.
>
>Since I get that initial spark (don't know if it's supposed to do that), I
>know the coil works fine. I've swapped out a few ICU's to see if that does
>the trick. The hall sender looks kinda flaky, so I'll go for that.
>
>Are there fusable links, or fuses somewhere in this circuit? I even try
>supplying the coil with constant battery power while I'm cranking and still
>no sparks.
>
>Light bulb went on in my head.
>
>The coil gets constant positive (#15) power, no? Or, is it pulsed?
>
>It's the negative (#1) power that gets to the coil that is controlled by
the
>ICU, no? If I were to give this coil a definate ground, would I be forcing
>this coil to make a spark? Could I wring its little neck?
>
>-Dave
>'81 Scirocco 16v
>
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